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Shaking table tests and parametric analysis of dynamic interaction between soft soil and structure group

机译：Shaking table tests and parametric analysis of dynamic interaction between soft soil and structure group

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摘要

Dynamic interaction between soil and structure group (SSGI) has received increasing attention due to higher requirements for urban seismic hazard prevention in recent years, especially in densely built areas. However, investigations on SSGI effects are still limited so far. To develop a better understanding on the SSGI effect, shaking table tests were conducted on a series of soil-structure and soil-structure group systems, where the influence of structure height, the number of structures, the composition of structure group and seismic records was considered. Besides, a three-dimensional numerical model was proposed to account for the SSGI effect and was verified through experimental results, based on which parametric analyses were conducted. It is found from the test results that as compared with the soil-structure interaction (SSI), the SSGI effect on accelerations at the top of the superstructures ranged from-40 to 27. In general, the SSGI effect is significant for soft soils, and increases with larger number of structures and smaller structure spacing. In addition, the SSGI can change the response spectra of ground acceleration and significantly alter the maximum Fourier amplitude of acceleration responses of structures.

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